Low Head, Low Problems: An inexpensive retrofit to low head dams Debris handling is expensive. Side intakes at low head dams are the most common application for raw water intakes, most of which require a significant amount of debris handling. The majority of debris handling at these sites is done by mechanically driven equipment, including: traveling screens and rak- ing devices. These equipment options require significant maintenance costs. Elgin has intro-duced a passive intake screen alternative that utilizes the natural flow of the water to handle debris is-sues. Coanda screens are a run-of-river application that are designed to shear off the super critical layer of flow as debris and marine life pass over the screen down the river. Coanda screens capitalize on wa- ter’s natural

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